imap.neobee.net has no CNAME records.
Question and response
Question
dig imap.neobee.net. NS
Answer
The response has no answer records.
Authority
neobee.net. 4339 SOA pcelica.neobee.net. dns.neobee.net. 2021112301 28800 14400 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0